Thats what I thought EZ but a late 5.7(350) should be cost effective also. Is the 4.3 V6 still being built? Arent we talking about different series of engines. I have never paid any attention to the newer GM motors but isn't the 5.3 sort of a cast iron version of the LS1. Why not look in to a Aluminum motor? they should be easier to find now.
4.3 or 5.3
- Thread starter JeepTJ38
- Start date
Thats what I thought EZ but a late 5.7(350) should be cost effective also. Is the 4.3 V6 still being built? Arent we talking about different series of engines. I have never paid any attention to the newer GM motors but isn't the 5.3 sort of a cast iron version of the LS1. Why not look in to a Aluminum motor? they should be easier to find now.
tweakeyjeep
Soccer Mom
- Location
- Sandy
It's all about the Dodge Ram or Ramcharger 5.9L V8. My bro tried putting that in his CJ 7 which is also part YJ but it's too long. I read an article that some dude put that in his TJ, but it was a pretty penny to do it .
Originally posted by tweakeyjeep
It's all about the Dodge Ram or Ramcharger 5.9L V8. My bro tried putting that in his CJ 7 which is also part YJ but it's too long. I read an article that some dude put that in his TJ, but it was a pretty penny to do it .
I have seen several of these. What was too long? Not the engine. Was he trying to use that long overdrive auto?
tweakeyjeep
Soccer Mom
- Location
- Sandy
Well he bought the whole drivetrain out of a '93 Ramcharger with the Auto, but he was going to mount it up to his CJ-7 drivetrain (whatever comes in a '84 CJ manual tranny and T-case. It ended up being too long so he didn't use it. he just kept the 350 in it. Or 360... I dunno he bought 3 different engines and couldn't decide what he wanted in it. he has a 401 laying around too!
It's chillin at Rocklogic right now gonna get full internal and exo cage. Carl and Von will also wire it up for him so it will start.
It's chillin at Rocklogic right now gonna get full internal and exo cage. Carl and Von will also wire it up for him so it will start.
grinch
inner city redneck
- Location
- Salt Lake City
If your looking for an all aluminum almost direct bolt in replacment for a 2.5 4 cyl the short star is the way to go..... It is a copy of cadalacs north star minus 2 clynders...... There is a big write up on in it in one of the last JP magizne isues..... we actually looked into it instead of doing the 4.3... for only 4,000 it comes turn key..... that means no adaptors needed, no computer needed, no accesories, bla bla bla.... All you have to do is modify the bell housing in one spot..... any of the local off road or machine shops can do this....... the engine only weighs around 320 lbs.... put out close to 300 Hp and 300 lbs of torque......
After my one tone axles are done im saving my penneys( It will probably be till next spring by the time i have enough) to swap this engine in place of my 4.2...... I want the cool factor of this engine.
After my one tone axles are done im saving my penneys( It will probably be till next spring by the time i have enough) to swap this engine in place of my 4.2...... I want the cool factor of this engine.
Yes Bobdog, the 5.7 is definitely a great candidate. There are a lot of significant differences between the 5.7 and the 5.3 however.........wiring, computer crapola, coils for each plug, etc. etc. (Plus the numbers are different, torque peaks in different places, etc.)
EZ
EZ
That 's what I thought I consider the 4.3 V6 to be in the same familly as the 350 (5.7) and I beleive the 5.3 is more closely related to the aluminum corvette/camaro motors. I can't keep them strait any more as lately my mind is focused on what I beleive is the ultimate Jeep engine, a mild Bill Mitchell 427 Motown smallblock.
tweakeyjeep
Soccer Mom
- Location
- Sandy
See Carl knows more about my bro's rig than I do.... Shows how much we talk!
grinch
inner city redneck
- Location
- Salt Lake City
True but I was at Flaming Gorge this weekend and saw one of these engins in a sand rail (running dirt tires).... Oh man after seeing it work in the rail I need one of these engines..... even if its a remanufacturd one...... Man was it cool....
grinch
inner city redneck
- Location
- Salt Lake City
Ya ive seen their set ups....... Makes me jealous to..... Im gonna save up the pennies all winter and then try and hunt one down... If not im going to go with a vortec 4.3 I know the 350 dosent weigh to much more but im more conserd with weight (i.e. keeping the center of gravity low) than the few more ponies that the 350 squeezes out.....
JeepTJ38
AKA: THE MYTH
well I have found several 5.3. Look on ebay under jeeps and they have 3 or 4 posted there mainly from junk yards out east. Anyway I will be moving to COlorado soon the project may slow down but I'll let ya know when it happens how it works.
- Location
- Grantsville, Utah
4.3 has 210 ponies. 5.7 has 260-270. that's a lot more ponies for only 50 lbs.
JeepTJ38
AKA: THE MYTH
I think the 5.3 has 287 HP and something like 327 FT-LB. Or something like that.
SnwMnkys
Registered User
- Location
- Orem, Utah
A small block chevy is going to put out more low end torque then any smaller I6, hands down.
TigerStripe40
Arrogant Bastard
- Location
- Salt Lake City
Hmm. That's interesting, because, when I have wheeled with trucks running SBC's they usually have to rev their rpms up to get over stuff I simply idle over. If a SBC had more low end torque, they wouldn't have to rev their motors.
It's true that a SBC CAN produce more torque than an I6, but only in the upper RPM range of their power bands.
I6's have a VERY flat power curve, which means that you get most of your power available at idle. V8's on the other hand have a VERY CURVED power curve (ie Bellcurve). They don't make much power at idle speeds. In fact they make VERY LITTLE, you need to rev them for them to make more power. This is an inherant design in the V configuration of the cylinders. An Inline8 would be a torque MONSTER.
Also, lets look at another type of engine. How about a Diesel engine. 2 common Diesel engines in the consumer market are the 5.9 litre Cummins I6 and the 7.3 litre Power Stroke V8. The Cummins makes more torque, with 1.4 fewer litres, and 2 fewer cylinders.
The Power Stroke makes more HP, but less torque, that's a displacement issue.
It's true that a SBC CAN produce more torque than an I6, but only in the upper RPM range of their power bands.
I6's have a VERY flat power curve, which means that you get most of your power available at idle. V8's on the other hand have a VERY CURVED power curve (ie Bellcurve). They don't make much power at idle speeds. In fact they make VERY LITTLE, you need to rev them for them to make more power. This is an inherant design in the V configuration of the cylinders. An Inline8 would be a torque MONSTER.
Also, lets look at another type of engine. How about a Diesel engine. 2 common Diesel engines in the consumer market are the 5.9 litre Cummins I6 and the 7.3 litre Power Stroke V8. The Cummins makes more torque, with 1.4 fewer litres, and 2 fewer cylinders.
The Power Stroke makes more HP, but less torque, that's a displacement issue.
grinch
inner city redneck
- Location
- Salt Lake City
Your right abut the flat power in the i 6.... Its flat...... not to much to it.....
Most obstacles you encounter are going to involve a little engine rpm..... unless your wheeling flat ground witch is not to commen here in utah......
I dont want to hear any complaints of how a real wheeler idols through all the obstacles.... If you think that you have never been to or competed in any of the rock crawling circuits...
I cant think of a single competitive rig (That actually wins) that still runs a 4.0 or 4.2 inline 6.....
Once agine I run a 4.2 in my rig...... I know the ups and down of these engins they are not a bad choice for a trail rig, There are just better ones out there.....
Most obstacles you encounter are going to involve a little engine rpm..... unless your wheeling flat ground witch is not to commen here in utah......
I dont want to hear any complaints of how a real wheeler idols through all the obstacles.... If you think that you have never been to or competed in any of the rock crawling circuits...
I cant think of a single competitive rig (That actually wins) that still runs a 4.0 or 4.2 inline 6.....
Once agine I run a 4.2 in my rig...... I know the ups and down of these engins they are not a bad choice for a trail rig, There are just better ones out there.....